The National Weather Service issued a heavy snow warning, which remains in effect from midnight tonight to 7 p.m. Friday. The warning covers counties throughout southeast Michigan, including Washtenaw and Livingston.

Widespread heavy snow of 6 to 10 inches is expected throughout the area, with slightly less toward the Ohio border.

The weather service said snow will start late tonight and will become heavy by the morning rush hour. Throughout Friday, snow will continue to fall and will be heavy at times.

South of M-59, the snow could mix with sleet, the weather service said.

Wind also could be a factor - with 15 to 20 mph gusts causing drifting and blowing snow.

The weather service warned that travel may be dangerous, and drivers are advised not to travel tomorrow unless absolutely necessary.